All rights reservedPetrović Krajnik, LeaPetrović, Vladimir Krajnik, Damir2023-11-162023-11-162017978-989-99801-3-6 (E-Book)https://hdl.handle.net/20.500.14235/983Book of proceedings: Annual AESOP Congress, Spaces of Dialog for Places of Dignity, Lisbon, 11-14th July, 2017By its content, the article is an integral part of a more comprehensive research on the complexity and sustainability of urban structures and systems. It is focused on identifying the forms of activity and possible procedures of operationalisation and transformation of the urban functions acting in the everyday life of the inhabitants in the observed space. In studying the complexity, for the purpose of this article, it was necessary to define the basic notions that are applied in the process of analysis and generating the manifest dimensions of this phenomenon. As a starting point, a precondition is set according to which the identity of the notion can be identified identically in social and technical sciences. Accordingly, the basics are urban fabrics, generically followed by urban structures and constructs, and then finally spatial systems and configurations. In our considerations of complexity phenomenon, we use the following definitions of notions. Urban fabrics is a set of natural and artificial elements of components in the form of built and unbuilt parts of the observed space. It covers structures with elements of substructure and suprastructure, and all forms and types of ecostructures and infrastructures that connect them functionally and spatially. Urban structure (city) is a set of urban fabrics of the observed part of area that makes an administrative, functional and spatially connected entity. When in the consideration of urban structure (city) the people are included, their public and private needs, which are realized in the appropriate types of functions (institutions of public and private sector) and executed by appropriate processes, urban constructs appear. Urban construct is an urban structure connected with people, functions and processes in the observed area.EnglishopenAccessconferenceObject2870-2877